Businesses Can Reduce Carbon Emissions by using Mobile Evaporative Cooling

Many modern buildings require cooling either for the comfort of the occupants or to protect the processes or equipment they contain. There are three typical methods that can be employed to provide temporary space cooling these buildings; , evaporative cooling or a refrigeration based air conditioning system. The choice of system can have a dramatic effect on the total carbon emissions of the building due to their different electrical demands.

systems can provide comfort cooling for most of the year. During prolonged periods of high temperatures they are unable to maintain internal temperatures below 25°C. Refrigeration based systems are effective but can be expensive to operate. Mobile Evaporative coolers, which can produce air consistently below 22°C in the UK climate, provide a temporary cooling solution that consumes only a fraction of the electricity.

For low carbon cooling Mobile evaporative coolers typically consumes less than 15% of the electricity compared to the equivalent rated refrigeration-based cooling system.

The latest building regulations have resulted in buildings that require less . An unintended consequence of this, in many instances, is that heat generating equipment and the occupants within buildings now generate more heat than is required to maintain a comfortable temperature.

During the winter of 2008 companies saw an unprecedented increase in demand for cooling systems for buildings that required temporary air conditioning systems to operate during the winter! Mark Hills, CEO of Watkins Hire says “Electricity usage and the associated carbon footprint increased dramatically for some buildings this winter. “

Low Carbon Cooling Example

The following example shows how saving electricity by using an effective cooling solution can result in 1.5 tonnes of carbon savings for a 30KW cooling requirement.

For a building requiring 30KW peak load and 20KW minimum load using a cooling system from April to October from 6am to 6pm, 5 days per week, in London with electricity costing 8p/kWhr and water costing £1.20/m3 the numbers would be as follows:

Running Costs - Annual EVAPORATIVE COOLING

COP/EER 66.4

Electricity KWhr 1515

Electricity Cost £121

Water Usage cuM 45.5

Water Cost £54.65

Total Cost £176 15%

Running Costs - 1824 Hours EVAPORATIVE COOLING

Water use per hour L 25.0

Cost per hour £0.03

Running Costs - Annual AIR CONDITIONING


Electricity KWhr 14770

Electricity Cost £1,182

Water Usage cuM 0.0

Water Cost £0.00

Total Cost £1,182 100%

Running Costs - 1824 Hours AIR CONDITIONING

Water use per hour L

Cost per hour

Running Costs - Annual SAVING


Electricity KWh 13255

Electricity Cost £1,060

Water Usage cuM -45.5

Water Cost -£54.65

Total Cost £1,006 85%

Running Costs - 1824 Hours SAVING

Water use per hour L -25

Cost per hour -£0.03

Electricity use per hour kWh 0.8 8.1

Cost per hour £0.07 £0.65

Total cost per hour £0.10 £0.65 £0.55




Whether a single room, multiple offices, factory units, machinery or retail shops throughout the summer months, or maintaining critical environments such as server rooms or operating rooms at the right temperature, using Low Carbon Temporary Cooling can result in cost savings and a dramatic decrease in carbon emissions.

Companies like Watkins Hire deliver competitive cooling systems and employ experts who can guide businesses on using the most eco-friendly solutions. According to Hills, “Business owners often don’t realise that they can actually save money while being environment friendly. Everything that’s eco-friendly is not more expensive, and hiring evaporative cooling systems is just one example of this fact.”